Schools: healthy classroom air without waiting (decentralized)

We all know by now: poor indoor air makes learning more difficult and makes a school more vulnerable to waves of illness. This is not a retrospective, but an action plan for now. With decentralized ventilation you pack per room what is needed-without a big yard sale, and without waiting until the next vacation.

Why waiting is not an option

Learning suffers from heavy air: headache, drowsy feeling, restlessness-both in classroom and teacher's room.
Unconscious spread: those who are "just barely sick" can still infect many people in crowded rooms when the air is still.
Every space is different: small classroom, large dining room, teacher's room, gymnasium-one central regime rarely fits everyone.

What is decentralized ventilation?

A compact unit per classroom/room (recessed or surface mounted) which supply and removal with heat recovery (WTW). No ductwork throughout the building.
Result: pre-heated supply (comfort), windows can be closed (less noise/pollution), and smart control on CO₂/VOC/moisture.

Practical and feasible in inhabited schools

Phased: room by room, corridor by corridor.
Time Friendly: evening or weekend installation is perfect; the teaching week continues.
Limited nuisance: neat wall penetrations and finishing; for classroom units with 400-1000 m³/h are usually 2 penetrations per unit needed. Work can be done in the evenings or on weekends occur.
Measurable & fair: visible CO₂/VOC values; discussions give way to objective data.

Energy and cost: away from the "windows open" reflex

Recognizable: the air becomes heavy, windows fly open, children pull coats on, and you stoke the street. That costs real money. Decentralized heat exchangers provide constant fresh air and retains heat. Comfort up, lower energy costs-without noise and without drafts.

Maintenance without contract stress

The unit signals itself (lamp/app) when a filter cleaning or is needed. The school technician can do this himself do this; the frequency is use-dependent (near busy road, activities, candles, etc.).
No compulsory service contract where you don't know the final bill; those who want to, just opt for an annual check.

Typical school spaces - here's how to tackle them

Classrooms: quiet basic ventilation on CO₂/VOC; short boost at start of class/full occupancy.
Eetzalen: higher peak flow rates during midday; automatic off-peak switching.
Teacher's room: comfort for long periods of sitting; extra quiet in base position.
Sports or multi-purpose room: higher powers only during use; rest of the day back to low.

"Does it have to be during the vacations?"

No. Decentralized is retrofit-friendly. We work phased and out of class. One classroom done? Next on the list. School operation continues to run.

Short roadmap (management/VGO/AGSO).

Zero measurement per classroom (CO₂/VOC) during a normal teaching day.
Prioritize: top-5 problem rooms first (classroom, dining hall, teacher's room).
Pilot: equip 2-3 classrooms; 4 weeks of measuring/experience.
Rollout: Continue rollout by wing/floor (evening/weekend).
Management: visible meters + filter alerts; annual visual check.

Conclusion: delay is not a technical problem, but a choice

Healthy air is education base-such as light, silence and safety. With decentralized it is feasible, quick and manageable. Start today in one classroom. You'll notice it tomorrow throughout the school.

Relevant links